How to Check Radon Levels at Home

Pre-test Preparation

• 1

  Examine an official radon map. The U.S. government publishes these maps to inform the general public about radon levels throughout the country.

• 2

  Purchase a radon testing kit from your local hardware or do-it-yourself store. Make sure that the kit is approved by an appropriate government authority.

• 3

  Close the basement windows and doors for a minimum of 12 hours before starting the test. Testing must take place in the lowest part of the house such as the basement.

Short-term Testing

• 4

  Short-term tests take up to seven days. Keep windows and doors closed for a minimum of 12 hours throughout the test. During this period you can enter the basement, but close the door.

• 5

  Place the detector on a shelf at least 2 feet off the floor and away from the ceiling and wall. Keep it in a visible place but do not disturb it.

• 6

  At the end of the test period, follow the written instructions and send the detector to the laboratory for analysis. If the reading comes back at a level of 4.0 pCI/l or more, you may have to carry out a longer test with another kit.

Long-term Testing

• 7

  A short-term test showing a reading of 4.0 pCI/l or more indicates the need for a second test. Purchase a long-term test kit that performs the test from between three months and a year. This kit is more accurate as it takes into account seasonal fluctuations of radon over a 12-month period.

• 8

  Put the detector in a suitable place in the basement, between floor and ceiling, away from drafts, walls, heat and damp areas.

• 9

  When the test period has expired, send the detector to the laboratory for analyzing. If the reading is high, you will need to take further steps to reduce the radon level in your home.

Hiring the Professionals

• 10

  If you do not want to perform the test yourself and want a quicker, more thorough test, then employ a radon mitigation specialist. The National Environmental Health Association or your state radon office can provide a list of certified specialists.

• 11

  Get estimates from at least three companies.

• 12

  Research your radon specialist. Check that they have proficiency certificates. Find out if they are state certified, licensed to carry out the testing and have public liability insurance. Examine I.D. badges of their representatives. Investigate their website and any claims they make.

• 13

  Get a contract from the radon specialist. Read it thoroughly and clarify any unclear points before signing.